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CAPSTAN MOTOR TROUBLESHOOT
The capstan motor fails to run.
Is the voltage more than about
NO
t
NO
I
I
NO
Is 2.5V at pin (4) of MC connector ?
NO
Is the voltage more than about
connector 7
I
t
I
Is the voltage at pin (6) of MC
connector 1.6-2.7V ?
N O
I
YES
I
Check/replace the capstan
NG
I
FLOW CHART NO. l-6
Check IC7701 and all the way up
to pin (3) of IC8801.
I
I
.
Check the PCSV line.
I
I
I
Check R7741, R7742,
ins (70) and
the way up
to the 2.5V line.
I
I
Check between the MC
connector and IC7701, and
between the MC connector and
pin (2) of IC8801.
I
I
I
I
Check the ATl2V line.
I
I
TAKE-UP REEL PULSE GENERATOR TROUBLESHOOTING
sensor pulse appears.
Insert the cassette, and
Are there the
take
up/sup
the col ectors of
NO
Are there the take
up/sup
YES
the col ectors of
NO
Replace the
up/supply reel sensors
HEAD SWITCHING PULSE TROUBLESHOOTING
I
No head switching pulse.
rotating ?
I
I
YES
Are the drum PG and
t
drum FG signal inputted
to pins (66) and (67) of
Are there the drum PC
and drum FG Signals at
pins (5) and (3) of
connector E8 1
NO
Check the harness EB-ME
and the drum motor unit.
FLOW CHART NO. 1-7
YES
Check between D8804
and Q8802, between
FLOW CHART NO. l-8
I
. -
I
YES
pulse.
Check IC7702 and all the
Y E S ~
way up to pins (66) and (67)
of IC880 1.
I
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